-- Copyright (c) Huawei Technologies Co., Ltd. 2022-2022. All rights reserved.
-- 
-- this file licensed under the Mulan PSL v2.
-- You can use this software according to the terms and conditions of the Mulan PSL v2.
-- You may obtain a copy of Mulan PSL v2 at: http://license.coscl.org.cn/MulanPSL2
--
-- THIS SOFTWARE IS PROVIDED ON AN \"AS IS\" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
-- PURPOSE.
-- See the Mulan PSL v2 for more details.
return function(super)
    local SingletonClass = {}
    SingletonClass.__index = SingletonClass
    setmetatable(SingletonClass, super)

    function SingletonClass.new(...)
        if SingletonClass._instance == nil then
            SingletonClass._instance = super.new(...)
        end
        return SingletonClass._instance
    end

    function SingletonClass.get_instance(...)
        return SingletonClass.new(...)
    end

    function SingletonClass.destroy()
        SingletonClass._instance = nil
    end

    return SingletonClass
end